Yes. The weather forecast does appear to be severe in the midlands from next Monday.

Normally frost at night doesn't matter too much, at least for plants in a greenhouse, as the greenhouse is able to warm up during the day. However, in this case the daytime temperture is forecast to be around zero, with no sunshine. So temperatures in a cold greenhouse will become dangerous.

The forecast could be wrong. The Met Office does have a dreadful record for accuracy. And we don't know how long this cold snap will last, if it happens.

Personally, I intend to assess the forecast on Saturday and, if it still looks bad, then I shall bring a few seedlings and choice plants into the house for a couple of days.

In my case it has nothing to do with cockchafers. They are looking for worms. These badgers have a strong preference for grass on shallow damp soil, where worms are near the surface and easily found.

They also love to excavate the undergroud nests of wasps or bees. Last Summer a badger excavated a foot-wide hole in my garden to get at a nest. I covered the hole over. The fellow came back the next night, and I managed to get this photo...

I have climbing roses growing through apple trees, and also honeysuckle.

That works, though you need to ensure that the particular climbing plant is not too vigourous for the tree. Clematis ought to work well too.

If attempting to grow low growing plants beneath a tree, then you'd need to bear in mind that the ground beneath a tree is likely to be shaded, and also relatively dry - so that's not such a good idea, IMO.